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  2. Countercurrent exchange - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_exchange

    Counter Current Decantation (CCD) is used in some facilities to extract water, totally clear of Uranium. Exchange current decantation depicted in centrifugal extractors as 1st stage Zippe-type centrifuges use countercurrent multiplication between rising and falling convection currents to reduce the number of stages needed in a cascade.

  3. Countercurrent distribution - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_distribution

    Countercurrent distribution (CCD, also spelled "counter current" distribution) is an analytical chemistry technique which was developed by Lyman C. Craig in the 1940s. [1] ...

  4. Merrill–Crowe process - Wikipedia

    en.wikipedia.org/wiki/Merrill–Crowe_process

    The solution is separated from the ore by methods such as filtration (e.g. vertical leaf type clarifier filters) and counter current decantation (CCD). Afterwards a very clear solution is achieved by using pre-coated filters applying diatomaceous earth. Oxygen is then removed by passing the solution through a vacuum de-aeration column.

  5. Mixer-settler - Wikipedia

    en.wikipedia.org/wiki/Mixer-settler

    4 stage battery of mixer-settlers for counter-current extraction. Industrial mixer settlers are commonly used in the copper, nickel, uranium, lanthanide, and cobalt hydrometallurgy industries, when solvent extraction processes are applied. They are also used in the Nuclear reprocessing field to separate and purify primarily Uranium and ...

  6. Centrifugal extractor - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_extractor

    The number of stages needed in each section of the process would depend on process design requirements (necessary extraction factor). In the case in Fig. 6, four interconnected stages provide a continuous process in which the first stage is a decanting stage. The next two stages show a counter current extraction.

  7. Droplet countercurrent chromatography - Wikipedia

    en.wikipedia.org/wiki/Droplet_countercurrent...

    Droplet countercurrent chromatography (DCCC or DCC) was introduced in 1970 by Tanimura, Pisano, Ito, and Bowman. [1] DCCC is considered to be a form of liquid-liquid separation, which includes countercurrent distribution and countercurrent chromatography, that employs a liquid stationary phase held in a collection of vertical glass columns connected in series.

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  9. Countercurrent chromatography - Wikipedia

    en.wikipedia.org/wiki/Countercurrent_chromatography

    A high-performance countercurrent chromatography system. Countercurrent chromatography (CCC, also counter-current chromatography) is a form of liquid–liquid chromatography that uses a liquid stationary phase that is held in place by inertia of the molecules composing the stationary phase accelerating toward the center of a centrifuge due to centripetal force [1] and is used to separate ...